3216491 has 8 divisors (see below), whose sum is σ = 3469200. Its totient is φ = 2972160.

The previous prime is 3216487. The next prime is 3216497. The reversal of 3216491 is 1946123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3216491 - 2² = 3216487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3216491.

It is not an unprimeable number, because it can be changed into a prime (3216497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286 + ... + 2843.

It is an arithmetic number, because the mean of its divisors is an integer number (433650).

Almost surely, 2^3216491 is an apocalyptic number.

3216491 is a deficient number, since it is larger than the sum of its proper divisors (252709).

3216491 is a wasteful number, since it uses less digits than its factorization.

3216491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189.

The product of its digits is 1296, while the sum is 26.

The square root of 3216491 is about 1793.4578333488. The cubic root of 3216491 is about 147.6139653553.

The spelling of 3216491 in words is "three million, two hundred sixteen thousand, four hundred ninety-one".